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Thread: factoring and algebra question

  1. #1
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    factoring and algebra question

    9. x3 + x2 - x 1

    D. Apply Your Knowledge
    10. Suppose a football iskicked from the ground and its height, h, in feet above the ground is given byh = -3.9t2 + 15.6t.
    The time, t, represents thenumber of seconds after the ball is kicked. At what time does the football hitthe ground?
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  2. #2
    Forum Admin topsquark's Avatar
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    Re: factoring and algebra question

    Quote Originally Posted by nikkiann View Post
    [FONT="]9. x3 + x2 - x 1[/FONT]
    [FONT="] [/FONT]
    [FONT="]D. Apply Your Knowledge [/FONT][FONT="][/FONT]
    [FONT="]10. Suppose a football iskicked from the ground and its height, h, in feet above the ground is given byh = -3.9t2 + 15.6t.[/FONT]
    The time, t, represents thenumber of seconds after the ball is kicked. At what time does the football hitthe ground?
    What is the height of the ball when it hits the ground? It would be h = 0 m, right?

    -Dan
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  3. #3
    Member Cervesa's Avatar
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    Re: factoring and algebra question

    $x^3+x^2-x-1 = x^2(x+1) - (x+1) = \, ?$
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    Re: factoring and algebra question

    Quote Originally Posted by Cervesa View Post
    $x^3+x^2-x-1 = x^2(x+1) - (x+1) = \, ?$
    Damn, why did I never thought of that?
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